import React, { Component } from "react";
import './styles/App'

class App extends Component {
    componentDidMount() {
        console.log("======componentDidMount======")
    }
    render() {
        return (
            <div className="container">
                <div className="mt-4 alert alert-danger">
                    这里是一段警示文本
                </div>
            </div>
        )
    }
}

export default App